the Indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1.

@

0.1446

The indicated z score is

(Round to two decimal places as needed.)

The scores of individual students on the American College Testing (ACT) Program Composite College Entrance Examination have a Normal distribution with mean 18.6 and standard deviation 6.0. At Northside High, 36 seniors take the test. Assume the scores at this school have the same distribution as national scores. 1. What is the standard deviation of the sampling distribution of the sample mean score for a random sample of 36 students? A) 1.0 B) 3.1 C) 6.0 D) 18.6

Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find , the 9th percentile. This is the bone density score separating the bottom 9% from the top 91%.

Which graph represents ? Choose the correct graph below.

(Please see the attachment)

The bone density score corresponding to is ____.

(Round to two decimal places as needed.)

The graph below shows three different normal distributions.

Which statement must be true?

1. Each distribution has a different mean and the same standard deviation.
2. Each distribution has a different mean and a different standard deviation.
3. Each distribution has the same mean and the same standard deviation.
4. Each distribution has the same mean and a different standard deviation